Okay, I have just played my
first game with Crossroads, and I must say... tentatively... a bit... overpowered? (Resisting the urge to say the 'B' word.) Okay so this game had Baron, and more importantly, I suppose, Harem. Also Tactician, which helped kick-start some
massive turns. I'm talking playing Crossroads for seven cards. Seven. And it's either a mega-Village or the first three are non-terminals. The only other drawer of that magnitude (that I can think of) is Apprentice, and it costs you big time to do it. Okay, it probably helped that my opponent let me buy 7 Harems (and congratulated me for thinking to buy them).
I think it's also worth noting that Chapel was on the board, and went unbought. I think a Chapel deck would have been destroyed in this game.
Okay, so I suppose for me to get a more balanced view of this card, I'll have to play some games with it where it's not the clearly dominant strategy. It will be interesting how it goes without something like Harem to boost it. But, in my only experience with it, it far outclassed
"the most powerful Dominion card relative to its cost" (or would have if either of us had bought it).